The convergence of issues such as safety, lighting, and physical accessibility with problems of archaeological conservation make underground contexts particularly difficult to study, preserve, and make accessible to the public. The Hypogeum of Crispia Salvia at Marsala (Italy) is a particularly apt case study as the frescoed burial site, unique in all of Sicily, is now built over by an apartment complex that can only be accessed through scheduled tours. The authors, in partnership with the local archaeological authorities, harnessing the power of machine learning, created a digital model of this underground burial space using terrestrial laser scanning and digital photogrammetry. This is part of a larger ongoing effort to re-document important subterranean heritage sites of Sicily in order to make them accessible to both researchers and the public, increasingly important in a historic moment where even local mobility is limited due to a global pandemic.